Henry g



H G. &; E.- L. HALL.

Plow-Point. No. 64,974. Patented May 2l, 1867..

N.PE\ERS. PHOTO-UTHOQRAFHER. wAsHxNGmN, D. C

@stuiten tste getraut @fitta HENRY AND E. L. HALL, 0F PUTNAM, OHIO LamPatent No. 64,974, @zaad May 21, 1867.

j` menons.

TO ALL WHOM "IT MAY CONCERN:

Be it known that we, HENRY G. HALL and E. L. HALL, of Putnam, in thecounty of Muskingum, and State of Ohio, have invented a new and usefulimprovement inPlough-Points and Shares; and we do hereby declare thatthe following is a full, clear, and exact description of the same,reference being had to the accompanying drawings, forming part of thisspecification, and in which- Figure 1 shows the detached point of aplough with our improvements. Figure 2 shows the cutting-peint andiy themeans of attaching the cap at its extremity. Figure 3 shows the means ofattaching the cutting-point to the plough-point. Figures 4, 5, and 6show the method of fastening the side-plate and the coulter to theplough. Figure 7 shows a self-sharpening pointf p Figure 8 shows amethod of attaching a'self-sharpening point to the plough. Similarletters of reference indicate corresponding parts in the several gures..The object of this invention is the construction of a` plough-point, thecutting extremity and cutting edge of which shall be detachable, so thatthey maybe removed when worn out. i i v In the drawings, A representsthepoint of a plough detached from the plough, and having a side-plate,B, i which forms the cutting edge, and a point, C, which forms theanterior and cutting extremity of the ploughpoint. The side-plate andcutting-point are independent pieces of metal, of the proper shape fortheir purpose',

and made so as to be easily attached or removed, as may be desired. Theside-plate B we make of wrought or ehilledviron-or steel, with aside-iiauge, b, upon which the edge 'of the 'plough-point A rests,.andto which it is attached. At the point where' the ange b leaves theside-plate, the edge ofthe latter, rising above the-flange, is bevelledinward or dove-tailed. rlhe outer edge ofthe plough-point is bevelledinthe opposite direction and ts under the projecting shoulder of theside-plate to' insure greater strength and a more perfect union oftheparts. The side-plate is further secured to Ythe plough-point by two ormore hooked or shouldered pins, b b', attached to the side-plate andacting in the 4slots in the plough-point. We fasten the pin in its placesonietimes by means of a little' key,d, running under the shoulder orhook of the pin and preventing the latter from being withdrawn while thekey is in that position; the key when in place fitting smoothly into alittle hed in the surfaceof the metallic board, so as to form an even,smooth` surface, and sometimes by means of a pin shouldered er hooked in`the oppositedirection, .the hoek or shoulder passing over and restingupon a little-ledge, e, in the wall of the slot,- and the pin beingconfied in'v that position by means of a wedge, e, as shown in thedrawing, or by any other method of fastening that will answer thepurpose. rlhe cutting-point C is composed of two parts, a shank, c, ofwrought iron, and a cap or false point, c', of cast iron, cast upon theend ofthe shank, the latter being dove-tailed or furnished withvprojecting shoulders, c c, so that when the casting has been made thecap cannot come ofi'. Theshank of the cutting-point thus formed is themeans by which it is held in its place in the plough-point A, runninginto a dove-tailed groove, a, in the plough-point, and keyed or wedgedin by means of alittle wedge behind the shoulderfunder the plough.

We do not-claim a mortise-socket, for that has been already patented,and besides it does not accomplish our purpose as we desire; but we usea groove or bed cast in the-under surface of the plough-point, havingdovetail edges to confine the shank c, and running nearly back to theshoulder f, beneath which is an opening on a level with the bottom ofthe bed to admit the passage of the wedgewhich confines the shank c inthe bed. The 4cutting-point C may be made reversible or self-sharpening.When this is the case, the extremity of it, which is of" cast iron, musthe made in the shape of a wedge, with equally inclined surfaces; theedges of the shank must be made symmetrical; .and the edges of the bedin the plough-point must be made so aste fit the shank Aand holditfirmly whichever side of the shank may happen to he uppermost. yThis canbe accomplished in several ways; as, for instance, by making thedove-tail edges of the bed not straight, but in the shape of a groovewhich shall be the arc of a circle or of' any' other symmetrical figure,and making the edges of the shank c to correspond with the groove.

'We do not limit ourselves to.the use off the straight edges shown inthe drawings, but may use any ofthe methods of constructing thedove-tail edges which wel have referred to,.or which we may find bestadapted 'to secure the shank firmly', and yet t0 permit of its beingreversed for self-sharpening. The cap c may be chilled for greaterdurability. We also construct :t cutter or coulter, H, of cust orchilled iron or steel, in a separate piece, and attach it t-o theplough-point in such a, manner that it inuy be removed und replaced with:t new one when worn out. The cutter or Coulter may be for this purposefastened to the plough-point by a, similar arrangement of' pins, keys,and slots to thatabove described for fastening the side-piste-B to theplough-point, or any other suitable fastening may be used instead.

Our invention is designed Vto apply to plough-points marie independentof', and detachable from, the mouldboard or body of the plough, and thewhole plough-point or share, when the invention is attached to it, maybe fitted to and used upon any of' the varieties of' ploughs now in use.

Having thus described our invention, what we claim ns new, und desire tosecure by LettersPutent, s-

1. The detachable side-plate B of the plough-point A, substni'itinllyunsl und for the purpose specified.

2. The cutting-point C, composed of a. wroughtiron shank, c, und a.cil-st or chilled-iron cap, c', substantially as and for the purposedescribed. l l

3. The method above described of attaching the side-plate i3 to theplough-point A by menus of shouldered pins b projecting from theside-plate B into slots in the body of the plougivpoint, where theshoulders of thc pins rest on ledges or keys in the wells of the slots,substantially as and for the purpose specified.

4. The method of attaching the shank c to the plough-point A, abovedescribed.

V5. The independent cutter or coulter H, substantially es and for thepurpose described.V

6. The construction of the cutting-point C and the groove or bed a, asl.there described, so that the cuttingpoint may be self-sharpening,substantially ns and for the purpose specified.

H. G. HALL,

E. L. HALL.

"itnes'ses for H. G. HALL:

JAMES H. GRIDLEY, CHAS. A. PETTIT.

Witnesses for. E. L. HALL: CEAS. C. WILEs,

H. M. BISHOP.

